130521309889 has 2 divisors, whose sum is σ = 130521309890. Its totient is φ = 130521309888.

The previous prime is 130521309871. The next prime is 130521309917. The reversal of 130521309889 is 988903125031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86968959025 + 43552350864 = 294905^2 + 208692^2 .

It is a cyclic number.

It is not a de Polignac number, because 130521309889 - 2²¹ = 130519212737 is a prime.

It is not a weakly prime, because it can be changed into another prime (130521309859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65260654944 + 65260654945.

It is an arithmetic number, because the mean of its divisors is an integer number (65260654945).

Almost surely, 2^130521309889 is an apocalyptic number.

It is an amenable number.

130521309889 is a deficient number, since it is larger than the sum of its proper divisors (1).

130521309889 is an equidigital number, since it uses as much as digits as its factorization.

130521309889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 130521309889 in words is "one hundred thirty billion, five hundred twenty-one million, three hundred nine thousand, eight hundred eighty-nine".